The U.S. Geological Survey, in cooperation with the
National Oceanic and Atmospheric Administration and the Connecticut
Department of Environmental Protection, has produced detailed geologic
maps of the sea floor in Long Island Sound, a major East Coast estuary
surrounded by the most densely populated region of the United States.
These studies have built upon cooperative research with the State of
Connecticut that was initiated in 1982. The current phase of this
research program is directed toward studies of sea-floor sediment
distribution, processes that control sediment distribution, nearshore
environmental concerns, and the relation of benthic community
structures to the sea-floor geology.
The bathymetry data in this data set were collected during 2003 for
charting applications as part of NOAA project OPR-B340-RU, survey
H11045 aboard the NOAA Ship RUDE. The RUDE, which supports NOAA's
east-coast nautical charting mission, is outfitted to acquire
single-beam bathymetry with an Odom Echotrac DF-3200 duel frequency
echosounder and shallow water multibeam bathymetry with a Reson 8125
system. The Reson multibeam system operates at 455 KHz with a 120
degree across track swath and 240 beams along its swath.
Purpose:
To release the original 1.5-m uninterpolated gridded
bathymetry generated from NOAA survey H11044 in Long Island Sound off
Milford, Connecticut.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2005
Currentness_Reference: publication date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -72.306786
East_Bounding_Coordinate: -72.106895
North_Bounding_Coordinate: 41.153685
South_Bounding_Coordinate: 41.018163
Keywords:
Theme:
Theme_Keyword_Thesaurus: General
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: USGS
Theme_Keyword: National Oceanic and
Atmospheric Administration
Theme_Keyword: NOAA
Theme_Keyword: Woods Hole Science Center
Theme_Keyword: NOAA Ship RUDE
Theme_Keyword: multibeam bathymetry
Theme_Keyword: single beam bathymetry
Theme_Keyword: grid
Theme_Keyword: reconnaissance
Theme_Keyword: ArcView
Theme_Keyword: Survey H11045
Theme_Keyword: Coastal and Marine Geology
Program
Theme_Keyword: CMGP
Theme_Keyword: WHSC
Place:
Place_Keyword: North America
Place_Keyword: United States
Place_Keyword: U.S. East Coast
Place_Keyword: Long Island Sound
Place_Keyword: Connecticut
Place_Keyword: Branford
Place_Keyword: Townshend Ledge
Place_Keyword: Branford Reef
Place_Keyword: Atlantic Ocean
Access_Constraints: None
Use_Constraints:
Data are not for navigation purposes.
Public domain data are freely redistributable with proper
metadata and source attribution. Please recognize the National Oceanic
and Atmosperic Administration (NOAA) and the U.S.Geological Survey
(USGS) as the sources of this information.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Andrew L.Beaver
Contact_Organization: National Oceanic
and Atmospheric Administration
Original raw, unprocessed shallow-water multibeam and
single beam bathymetric data. Areas of no data between many of the
ship's tracks.
Process_Step:
Process_Description:
The multibeam data for this survey was acquired in
XTF (extended Triton data format) and recorded digitally through an
ISIS data acquisition system. Once digitally recorded, the XTF data
were processed using CARIS HIPS/SIPS software to quality control the
data and to incorporate sound velocity and tidal corrections. Data were
gridded to 1 m; vertical datum is mean lower low water.
Horizontal_Datum_Name: North American Datum
of 1983
Ellipsoid_Name: Geodetic Reference System 80
Vertical_Coordinate_System_Definition:
Altitude_System_Definition:
Altitude_Resolution: 0.000
Altitude_Distance_Units: meters
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: Latitude
Entity_Type_Definition: Latitude coordinate
of navigation
Attribute:
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 41.0234168
Range_Domain_Maximum: 41.1411507
Attribute_Units_of_Measure: Decimal
degrees
Attribute_Measurement_Resolution:
0.0000001
Detailed_Description:
Entity_Type:
Entity_Type_Label: Longitude
Entity_Type_Definition: Longitude coordinate
of navigation
Attribute:
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -73.128119
Range_Domain_Maximum: -72.936744
Attribute_Units_of_Measure: Decimal
degrees
Attribute_Measurement_Resolution:
0.0000001
Detailed_Description:
Entity_Type:
Entity_Type_Label: Depth
Entity_Type_Definition: Depth in meters
below mean lower low water
Attribute:
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -2.61
Range_Domain_Maximum: -53.22
Attribute_Units_of_Measure: meters
Attribute_Measurement_Resolution:
0.01
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological
Survey
Contact_Person: Larry Poppe
Contact_Position: Geologist
Contact_Voice_Telephone: 508-548-8700
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address:
lpoppe@usgs.gov
Resource_Description:
Downloadable Data: 1.5 m gridded bathymetry of NOAA survey
H11044
Distribution_Liability:
Although this data set has been used by the USGS and NOAA, no
warranty, expressed or implied, is made by the USGS or NOAA as to the
accuracy of the data and/or related materials. The act of distribution
shall not constitute any such warranty, and no responsibility is
assumed by the USGS or NOAA in the use of these data or related
materials.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: ASCII
Format_Information_Content: One File
(h11044_1_5m_decimal_degrees_xyz.txt)
File_Decompression_Technique: zip archive
Fees: none
Technical_Prerequisites:
The user must have a program capable of reading and
processing ASCII formated XYZ data files.
Available_Time_Period:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2005
Metadata_Reference_Information:
Metadata_Date: 20060126
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological
Survey
Contact_Person: Larry Poppe
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical
address
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543
Country: USA
Contact_Voice_Telephone: 508-548-8700 x2314
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address:
lpoppe@usgs.gov
Metadata_Standard_Name: FGDC Content Standards for
Digital Geospatial Metadata